rails                   
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have to  follow a set path. this path is 
 called a  "railway", which is  comprised 
 of two  metal rails, hence its nickname. 
                                          
 because the  low  friction  between  the 
 wheels of the train  and the rail metal, 
 there are limits  for how  acute a curve 
 can be, and  even more  so for  how much 
 the  ground  under   the  rails  can  be 
 sloped. thus a railway is often  not led 
 on top of hills, rather through  them in 
 tunnels   (if   they  are   large),   or 
            artificial chasms.            
                                          
 there will  be trees  on the side of the 
 rails, but not too close, or  they  will 
 be  cut  down by the  railway  janitors. 
 there  will  be  plains,  and  bodies of 
                  water.                  
                                          
 trains go  by  day and  by night.  along 
      the way, there is information       
 scattered,  often  put  on top of poles, 
 to be interpreted by  the train drivers. 
 different  parts  of  the  railway  have 
         different speed limits.          
                                          
 sometimes,  trains have to stop and wait 
 for  something to happen, far away. this 
 is  signaled  by  red  or  green lights. 
                                          
                                  
                                          
 many people  follow  the  rails by foot. 
 often  this proves  to  be  the  shorter 
 path between  two  points. however  this 
 is  frowned  upon,  and   very  impolite 
         toward the train drivers!